Miner&#39;s compass.



No. 635,606. Patanted Oct. 24, 1899.

W. VAN SLDUTEN.

MINEBS COMPASS.

(Application filed Apr. 3, 1899.)

(No Model.) 2 Sheets-Shoe;

5 u r r 7 1 4' a A l A f f WITNESSES:

' ave/w rr filvsrs.

"m: NORIII PETER! ca, Pqo'roLmqu. wamusrcm. o, c.

No. 635,606. 7 Patented Oct. 24,1899.

I W. VAN SLDOTEN.

IINEB'S COMPASS. (Application flhd Apr. 8, 1899.)

(I0 Modal.)

2 Shoots-Shut 2 Z L wmvsssss: 7% #20 5 m: noun Pitta: co. NOTD-LIYHQ. wumum'on. I1 :2.

UNITED STATES PATENT OFFICE.

WILLIAM VAN SLOOTEN, OF NEW YORK, N. Y.

MINERS COMPASS.

SPECIFICATION forming part of Letters Patent No. 635,606, dated October 24, 1899. Application filed April 3, 1899. Serial No. 711,497. (No model.)

TO ME whom, it may concern-.-

Be itknown that I, WILLIAMVAN SLooTEN, a citizen of the United States, residing in the city of New York, in the borough of Brooklyn and State of New York, have invented certain new and useful Improvementsin Miners Compasses, of which the following is a specification.

This invention relates to certain improvements in miners compasses, so that the out crop of veins of ore, beds of coal, &c., can be readily and accurately determined upon the surface of the ground and readily traced there on or its proper place indicated thereon in case said outcrop is hid by an overburden of rock or vegetation or other material; and the invention consists of an ordinary in iners compass and of an attachment arranged at right angles to the bar carrying the sights and consisting of a semicircular graduated frame attached to the needle-box of the compass, a slide-piece guided on said frame, and an auxiliary sight-bar pivoted to said slide-piece and provided with auxiliary sight-pieces or a telescope, said auxiliary sight-pieces or telescope in connection with the graduated frame permitting the tracing of the outcrops of veins or beds, as will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a side elevation of a miners compass with my improved attachment. Fig. 2 is a plan of the same. Fig. 3 is a side elevation and Figs. 4: and 5 are respectively a side view showing the connection of the auxiliary sight with the semicircular frame attached to the needle-box and a vertical transverse section on line 5 5, Fig. at, said figures being drawn on a larger scale.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the box of an ordinary surveying-compass, such asis used by surveyors, mining engineers,and others. The box A incloses the magnetic needle B and is provided with folding sightpieces 0 C, which are attached to diametrically opposite points 'of the box, said sights being provided with the usual slits for making observations. The needle plays over a graduated circle divided, as usual, into three hundred and sixty degrees. The box is connected by a screw-socket D with a Jacobsstaff E, said socket being provided with aballand-socket joint D, so as to permit the adjustment of the box by means of the usual levels into horizontal position.

The compass so far described is well known and forms no part of my invention.

At right angles or equatorially to the line of sight of the compass is arranged a semicircular frame F, that extends diametrically or equatorially across the box, said frame F being provided at its ends with recessesfand lugs f, the latter extending below the box, and withfastening-screwsf by which the frame is secured to the box accurately in line with the diametrical or equatorial line drawn through the numbers 9O at each side of the graduated circle of the box A. The semicircular frame F is provided with graduations at both sides, each quadrant of the same being divided into ninety degrees, both graduations beginning at the lower ends and running up to the center of the frame. Outside of the graduations the frame F is provided at each side with a guide-groove f in which is guided a slide piece F, that is secured by means of set-screwsf into the grooves f and provided with an oblong opening corresponding to the cross-section of the frame F, so that the slide-piece can be moved readily-over the same and be adjusted at any desired point on its graduation. piece F is provided with a rectangular side opening and an index, so as to permit the convenient reading off of the graduations on each side of the frame F. The slide-piece F is provided with a recess gin its upper end, to which is pivoted, by means of a lug g and clampingscrew 9 a supportingrpiece g ha vinga pin g To this pin is applied, by a sleeve 9 and setscrew 9 a bar G, that is provided at its ends with auxiliary stationary or folding sights G, which are secured by suitable set-screws g' at right angles to the bar G. The bar G, with its auxiliary sights G, is supported on the slidepiece at right angles to the frame F.

When the direction or strike and dip of the vein or bed of coal, ore, &c. at any point of outcrop is to be taken, the instrument is first placed in horizontal position, carefully leveled, and then its sights pointed in the angle of strike of the vein or bed, and then the slide- The lower part of the slidepiece, with its auxiliary sights or telescope, is moved over the frame and placed in plane of the dip and the outcrop of the vein or bed sighted, after which the outcrop at all points on the surface can be laid off and traced if the vein or bed preserves a regular strike and dip. The outcrop of vein or bed can be thus traced as far as may be deemed correct or convenient, thus saving much Work as compared with the ordinary methodsheretofore employed for determining the outcrop on the surface.

My improved attachment is designed to facilitate the Work of the mining engineer in determining the outcrops of Veins and beds and forms a very useful and time-saving attachment to the ordinary miners compass, to which it can be readily applied, so that the compass can be used at the same time for determining the angle or dip of veins of ore or beds of coal, if necessary, but fordetermining more particularly the outcrop at some point, so as to trace it then readily on the surface.

Having thus described my invention,I claim as new and desire to secure by Letters Patent- 1. The combination with an ordinary miners compass, of a semicircular graduated frame secured thereto at right angles or equatorially to the sights of the compass, a slidepiece guided on said frame, and an auxiliary bar and sights or telescope supported on said slide-piece, substantially as set forth.

2. The combination, with an ordinary miners compass, of a semicircular graduated frame secured at right angles or equatorially to the sights of the compass on the needle-box of the compass, said frame .being provided with a guide-groove on each side, a slide-piece guided along said frame, set-screws extending through the slide-piece into said guidegrooves, and an auxiliary bar supported on said slide-piece at right angles to said frame and carrying sights or a telescope, substantially as set forth.

3. An attachment for miners compasses, consisting of a semicircular graduated frame, means for attaching it to the needle-box of the compass, a slide-piece guided along said gradu ated frame, and an auxiliary bar having sights and supported on said slide-piece at right angles to said frame, substantially as set forth.

4:. An attachment for miners compasses, composed of a graduated semicircular means at the lower end of said frame for attaching it to the needle-box of the compass, said frame having guide-grooves, a slide-piece guided in said grooves,means for clamping said slidepiece to said frame, and an auxiliary bar sup ported in said slide-piece at right angles to said frame and provided with sights or a telescope, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

WILLIAM VAN SLOOTEN.

Witnesses:

PAUL GOEPEL, M. H. WURTZEL. 

